摘要
采用Liang-Rogers的形状记忆合金(SMA)本构模型和相变动力学关系,编写了ABAQUS中的相应UMAT用户材料子程序,模拟了形状记忆合金材料的超弹性行为和形状记忆效应,并在不同温度和应力状态下验证了程序的正确性。基于此程序,建立了埋入SMA丝的复合材料层合板结构计算模型,仿真计算了两端固支边界条件下,热驱动SMA时的结构的固有振动特性,分析了SMA丝的热驱动温度,埋丝数量及埋设方式等对结构热振动特性的影响规律。模拟结果表明:加热驱动SMA丝一般会提高结构的固有频率,增加SMA丝的数量可以实现增大结构频率的目的;不同的埋设角度对结构的振动特性影响显著。这些结论将对智能复合材料结构设计、抗热设计有一定的指导作用。
Shape memory alloy (SMA) material behavior is programmed in form of an ABAQUS user material subroutine (UMAT) using Liang-Rogers constitutive model, and this program is successfully verified with responses of pseudoelasticity and shape memory effect (SME) at various temperatures and stress levels. Based on the ABAQUS UMAT code, the natural vibration characteristics of a composite laminated plate with embedded SMA wires under thermal excitation are calculated. The effects of SMA wire temperature, number of wires and their orientations on the vibration characteristics of the plate are discussed. The simulation results show that increasing temperature and number of SMA wires may raise the stiffness of the structure generally and the orientation of the SMA wires affect the vibration characteristics obviously. These conclusions can provide some advice for structure design and heat-resistant design of smart composite structures.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第9期55-58,75,共5页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(50475147)
关键词
形状记忆合金
本构模型
复合材料层合板
振动
shape memory alloy (SMA)
constitutive model
composite laminated plate
vibration
